C3 ( CTHR ) Diamond in the rough? Message Board

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Biotech / Medical : C3 ( CTHR ) Diamond in the rough?

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Oct 31 12:16 PM EST

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To: Jeff Grossman who wrote (19)	11/19/1997 5:24:00 PM
From: blankmind	Read Replies (2) of 226

Impressive: <<Moissanite is not yet a familiar name outside of a few gemologists, but in late 1997 it is likely to begin making a huge splash in the gem world as the latest and greatest diamond simulant. This synthetic silicon carbide crystal was discovered by a materials scientist at North Carolina State University and is being developed by C3 and Cree Research. Its natural counterpart has been found only in meteorites and is deep green, but the synthetic moissanite is colorless and will probably fool quite a few jewelers and jewelry buyers before it becomes better known. Its high refractive index and extreme hardness (second only to diamond) make it an effective diamond simulant, and the popular diamond probes that test electrical conductivity fail to distinguish it from diamond. The easiest way to identify it is by its double refraction -- look through the stone from several different angles and you should see double images of facet lines or objects viewed through the stone. Keep your eyes out for this one! >>

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